I prefer Stevie without the bangs, too. And you're right, the Mac does look older than on The Dance --- seven years ago.
But as long as the band is healthy & active, I don't care about how old they look. (As long as Stevie doesn't dress old.

) I don't see ANY of them retiring until they have to, to be honest. Even if they took a break from touring, the songwriting is in Stevie's & Lindsey's blood, and I could definitely see Lindsey in particular getting more out there to produce albums for younger performers. And Stevie continues to bond to the younger performers as well. She's an icon & will never be marginal again in this lifetime as long as she stays off the bad stuff.
To me there's something comforting in watching these heroes age & still rock out. I don't look at them and see them in their twilight. I just feel lucky to be alive at a time when I can see them live & take note firsthand of every change they seem to go through.
As they say, aging is better than the alternative.
- Jake